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[1]LIU Likun,ZHAO Guangju,MU Xingmin,et al.Soil Quality Evaluation Along the Qinghai-Tibet Highway Based on the Minimum Data Set[J].Research of Soil and Water Conservation,2022,29(02):125-131.

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Soil Quality Evaluation Along the Qinghai-Tibet Highway Based on the Minimum Data Set

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 02 Page number: 125-131 Column: Public date: 2022-03-20

Title:: Soil Quality Evaluation Along the Qinghai-Tibet Highway Based on the Minimum Data Set

Author(s):: LIU Likun^1,2, ZHAO Guangju^1,2, MU Xingmin^1,2, GAO Peng^1,2, SUN Wenyi^1,2, HAN Jianqiao^1,2; (1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China)

Keywords:: soil quality; principal component analysis; minimum data set; Qinghai-Tibet Plateau

CLC:: S152; S153; S158

DOI:: -

Abstract:: In order to clarify the characteristic of soil quality along the Qinghai-Tibet highway, field sampling was undertook to investigate soil quality variation between three different types of land use(farmland grassland, and sandy land)in this study. The principal component analysis method(PCA)was used to select the minimum data set indicators, and soil quality index was built to quantitatively evaluate soil quality. The results showed that:(1)compared with farmland and grassland, the soil fertility of sandy land was relatively poor, and the soil fertility grades of soil organic matter, total nitrogen and available phosphorus were all grade 6; the nine soil indicators in the study were all low-to-medium sensitive indicators, and clay and silt content of sandy land had stronger spatial differentiation;(2)the minimum data set for soil quality evaluation was consisted of total potassium, total phosphorus, organic matter, clay and silt content; the minimum data set could better replace the full data set for soil quality evaluation(p<0.01);(3)the soil quality index SQI(0.535±0.043)of the farmland was higher than the grassland SQI(0.499±0.044)and the sandy land SQI(0.449±0.066). This study found that the soil quality of farmland along the line was at a medium level, while the soil quality of grassland and sandy land was at a low level, and soil organic matter was the main factor affecting soil quality along the Qinghai-Tibet Highway.

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Last Update: 2022-04-20